EE STATED THAT HE WAS INSTALLING A ROOF BOLT IN NO. 3 ENTRY WHEN THE ACCIDENT OCCURED. EE STATED THAT HE HAD FINISHED THE PROEDURE OF DRILL THE HOLE, INSERTING THE RESIN AND BOLT,HAD SPUN THE BOLT AND WAS WAITING FOR THE RESIN TO HARDEN. HETSTATED THAT THE ROOF BOLT WRENCH BROKE WHEN HE ATTEMPTED TO TORQUE THE BOLT. WHEN THE ROOF BOLT WRENCH BROKE, A PIECE OF THE WRENCH FLEW LOOSE